Hermann schtlssler



@uiten tutes etent @frn HERMANN` scH'r'rssLnR7` 0F SAN FR.Munson,` ALIFORMA.-

l Letters Patent No.'73,391,'dated January '14, 1868.

IMPROVEMENT IN ,AGHAIN-INGLINOMETERS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, HERMANN SCHSSLER, of San Francisco, county of San Francisco, State of California,

have invented4 an Inclinometcr for Surveyors Chains; and I do hereby declare the following description and accompanying drawings'are sullicient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention without further invention or experiment.

, The naturoof my invention is to provide a chain-inclinometer, to indicate the amount of correction to be made on each'ehains length, which con be employed for all ciril engineering purposes, by being attached to a surveycrs chai-n, and consists of three ports, to wit, the level, moving about a central point, which point forms the centre oall the ares of the scale, and, as the two sides of the glass are ground parallel, it can be used, if reversed,l in chaining dorm a hilh i The inclinometer can be: det-ached :"rom the chain, when -it may be used in setting the slope of railroad-embankments, dams, ditches, g

To more fully illustrate and describetmy invention, reference is had to the accompanying drawings and the letters marked thereon.

Referring to the drawings, the scale-A A indicates the number of units to be' added to' any chain of fty (50) part-s, or one half the number of units for any chain of' one hundred (1005 parts, for anyncline over which the measurement is made. For instance, the two chainmen ascend a hill, the first one carrying the inelinometer, and after the chain is stretched parallel with or on the slope, and while pulling the chain by the handle III, with his left hand, he may move the level II into its horizontal position with his right hand, and read olf the number on the scale A `A A, which isindicated by thefaee g f oi' the handfgfiz. supposing the position of the level so acquired was as indicated by the red lines in the diagram, the hand being now inthe position'g fk, would read 37@ which means that a pin has to he placed-3:15 units ahead of the end of the chain. At the same time, wedind g f to indicate the number of degrees between the inclination and the horizontal. The opposite side of the arc II is also provided with the scales A A A and B rB B, and the level I is reversible, which admits of the emplymcntof theinclinometer for measuring` down hill, as well as for setting slope-stakes for railroads,

embankmen'ts, dams, ditches, &c., as the scale C C C indicates the inclination of slope, from 6:1 up to 1:1. In this case the swivel is to be detached from thc inelinouieter by the screw z'.

By the use of my inclinometer, the diliculties of chaining on steep slopes will beLin a great mcasure,'

avoided. The whole length of the chain will be available', ns there will now be no necessity of levelling the chain, the inelinometer correcting all the measurements, as described, and with absolute correctness.

Having thus describedmy invention, what I claim, and desire to secure by Letters Patent, is-

A chain-inclinometer, having the level I vand the scale A A, togetherV with the handle III, for ascertaining the correct horizontal distance when measuring the whole, constructed and operated substantially as and for the purpose herein described. I

In Witness whereof, I have hereunto set my hand and seal. g

H. soH-sstnn. [n s] lllitnesses:

J. L. Boone, Gmo. H. STRONG. 

